Cum and fishy smell?

K

When me and my boyfriend have sex quite a lot in one day (5 times) I’m left with a sort of fishy smell in my vagina. I’m not sure if it’s bacterial vaginosis or the pH levels being thrown off since I know that semen can do that. It only lasts a couple of days and doesn’t have any other symptoms but I’m just curious as to whether anyone else experiences this?